HTTP Status Code Checker

Understanding HTTP Status Codes

HTTP status codes are three-digit numbers that web servers use to communicate the outcome of a client's request. They provide information about whether a request was successful, encountered an error, or requires further action.

Common Status Code Categories:

• 1xx (Informational): Provisional response, indicating that the request was received and understood. Seldom used.
• 2xx (Success): The request was successfully received, understood, and accepted.
• 200 OK: Standard response for successful HTTP requests.
• 201 Created: The request has been fulfilled, resulting in a new resource being created.
• 204 No Content: The server successfully processed the request but is not returning any content.
• 3xx (Redirection): Further action needs to be taken by the client to fulfill the request.
• 301 Moved Permanently: This and all future requests should be directed to the given URL.
• 302 Found: The resource resides temporarily under a different URL.
• 304 Not Modified: Indicates that the resource has not been modified since the last time the client requested it.
• 4xx (Client Error): The request contains bad syntax or cannot be fulfilled.
• 400 Bad Request: The server could not understand the request due to invalid syntax.
• 403 Forbidden: The client does not have permission to access the resource.
• 404 Not Found: The server has not found anything matching the requested URI.
• 5xx (Server Error): The server failed to fulfill a valid request.
• 500 Internal Server Error: A generic error message given when an unexpected condition was encountered.
• 502 Bad Gateway: The server, while acting as a gateway or proxy, received an invalid response from an upstream server.
• 503 Service Unavailable: The server is currently unavailable (overloaded or down for maintenance).

Understanding these codes helps diagnose issues and improve website performance. You can also use our HTTP Header Checker for more information.